Shower unit



FIG. 1 is a side perspective view of a shower unit showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a side elevation view, the opposite side being a mirror image thereof; and,

FIG. 6 is a front elevation view thereof. 

The ornamental design for a shower unit, as shown and described. 